Adam Pash

The How To Do Stuff blog has posted a tutorial for making your own hollow book (you know - for hiding booty). All you need is:

Elmer's white glue

a container to hold glue solution (I've chosen a film canister)

X-acto knife, and/or box cutter. Both if you have them

brush to apply glue solution

pencil/pen

ruler, or other rigid straight edge

Once you've got what you need, it's a pretty simple matter of gluing and cutting. If you're big fan of trap doors and secret hiding places (who isn't?!), the secret storage book should be right up your alley.